Default Users of Clusters with Kerberos Authentication Disabled

User Classification

The MRS cluster provides the following two types of users. Users are advised to periodically change the passwords. It is not recommended to use the default passwords.

User Type	Description
System users	User who runs OMS processes
Database users	User who manages OMS database and accesses data User who runs the database of service components (Hive, Loader, and DBService)

System users

User Idap of the OS is required in the MRS cluster. Do not delete this account. Otherwise, the cluster may not work properly. Password management policies are maintained by the operation users.
Reset the passwords when you change the passwords of user ommdba and user omm for the first time. Change the passwords periodically after retrieving them.

Operation	Username	Initial Password	Description
System administrator of the MRS cluster	admin	Specified by the user during the cluster creation	MRS Manager administrator. This user also has the following permissions: Common HDFS and ZooKeeper user permissions. Permissions to submit and query MapReduce and Yarn tasks, manage Yarn queues, and access the Yarn web UI. Permissions to submit, query, activate, deactivate, reassign, delete topologies, and operate all topologies of the Storm service. Permissions to create, delete, authorize, reassign, consume, write, and query topics of the Kafka service.
MRS cluster node OS user	omm	Randomly generated by the system	Internal running user of the MRS cluster system. This user is an OS user generated on all node and does not require a unified password.
MRS cluster node OS user	root	Set by the user	User for logging in to the node in the MRS cluster. This user is an OS user generated on all nodes.

Operation

Username

Initial Password

Description

System administrator of the MRS cluster

admin

Specified by the user during the cluster creation

MRS Manager administrator.

This user also has the following permissions:

Common HDFS and ZooKeeper user permissions.
Permissions to submit and query MapReduce and Yarn tasks, manage Yarn queues, and access the Yarn web UI.
Permissions to submit, query, activate, deactivate, reassign, delete topologies, and operate all topologies of the Storm service.
Permissions to create, delete, authorize, reassign, consume, write, and query topics of the Kafka service.

MRS cluster node OS user

omm

Randomly generated by the system

Internal running user of the MRS cluster system. This user is an OS user generated on all node and does not require a unified password.

MRS cluster node OS user

root

Set by the user

User for logging in to the node in the MRS cluster. This user is an OS user generated on all nodes.

User Group Information

Default User Group	Description
supergroup	Primary group of user admin, which has no additional permissions in the cluster with Kerberos authentication disabled.
check_sec_ldap	Used to test whether the active LDAP works properly. This user group is generated randomly in a test and automatically deleted after the test is complete. which is an internal system user group used only between components.
Manager_tenant	Tenant system user group, which is an internal system user group used only between components. It is used only in clusters with Kerberos authentication enabled.
System_administrator	MRS cluster system administrator group, which is an internal system user group used only between components. It is used only in clusters with Kerberos authentication enabled.
Manager_viewer	MRS Manager system viewer group, which is an internal system user group used only between components. It is used only in clusters with Kerberos authentication enabled.
Manager_operator	MRS Manager system operator group, which is an internal system user group used only between components. It is used only in clusters with Kerberos authentication enabled.
Manager_auditor	MRS Manager system auditor group, which is an internal system user group used only between components. It is used only in clusters with Kerberos authentication enabled.
Manager_administrator	MRS Manager system administrator group, which is an internal system user group used only between components. It is used only in clusters with Kerberos authentication enabled.
compcommon	MRS cluster internal group, used to access public resources in the cluster. All system users and system running users are added to this user group by default.
default_1000	User group created for tenants, which is an internal system user group used only between components.
launcher-job	MRS internal group, which is used to submit jobs using V2 APIs.

OS User Group	Description
wheel	Primary group of MRS internal running user omm.
ficommon	MRS cluster common group that corresponds to compcommon for accessing public resource files stored in the OS of the cluster.

Database users

MRS cluster system database users include OMS database users and DBService database users.

Do not delete database users. Otherwise, the cluster or components may not work properly.

Operation	Default User	Initial Password	Description
OMS database	ommdba	dbChangeMe@123456	OMS database administrator who performs maintenance operations, such as creating, starting, and stopping.
OMS database	omm	ChangeMe@123456	User for accessing OMS database data
DBService database	omm	dbserverAdmin@123	Administrator of the GaussDB database in the DBService component
	hive	HiveUser@	User for Hive to connect to the DBService database
	hue	HueUser@123	User for Hue to connect to the DBService database
	sqoop	SqoopUser@	User for Loader to connect to the DBService database.